It's like an old version of simic sky swallower, as they are both 6/6 tramplers with shroud for blue decks. :)

Well, deep spawn got no flying and costs one more mana. But on the other hand, it doesn't require you to play green, you can target it with stuff if you want to (like to equip it or put some aura on it), and it's milling ability can be used to gain threshold or put stuff with unearth / flashback / retrace or incarnations in your graveyard. Not to mention pedantic learning or narcomoeba.

Sure, the skyswallower is still better. I'm just saying that the deep spawn ain't as horrible as some people claim and can make sense in some decks. Not to mention it won me a few drafts. :) And it got great art. :)

You know, a creature like this was ahead of its time. The shroud, while somewhat sucky, can save it in a pinch. The self-milling is actually a boon in some decks, and if you're playing reanimation, you won't be playing the mana cost for this, ever.

@Radagast: The upkeep cost won't hurt you (and might even help you, in the right deck) unless it mills you completely to death. But if you can go that long with a 6/6 trampler without crushing your opponent, then you deserved to lose.

It's not the upkeep that makes this unusable, it's just plain the mana cost.